GRAMZ Posted July 20, 2011 Share Posted July 20, 2011 Hey there, 04 6.0l egr cooler oil cooler and head gaskets done 19000km ago came in now for excessive purging out degas bottle, egr cooler badly failed , replaced egr cooler and oil cooler retest just started to build 20 psi mgp and coolant pressure was already at 17 psi, removed cylinder heads, gaskets looked not bad, sent out heads were cracked in usual places , but advised to replace any way, so has 2 new cylinder heads new egr cooler and oil cooler , test drove today still building excessive coolant pressure, used combustion tester chemical, came out positive for combustion in coolant, any one else had problems with a block? or what else could cause this?boss wants to order a short block .help me thanks Quote Link to comment Share on other sites More sharing options...
DieselD Posted July 21, 2011 Share Posted July 21, 2011 Yes, I have had cracked cylinder walls before. I had a truck that would build coolant system pressure abnormally fast at idle. Figuring it had a severe headgasket failure/and or leaky coolers I yanked it apart. The coolers where not blown(first clue) then looking at the headgaskets I saw no obvious signs of leaks knowing that there had to be another issue. I found a hairline crack on cyl 1 about midway down the wall maybe 3" long. Another clue was looking at the top of the piston I could see the spray pattern of combustion loss. At first glance I didnt see it, get the holes clean and look at it closely for anything abnormal, I bet you find something Quote Link to comment Share on other sites More sharing options...
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